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    You can preserve food at home in as little as 20 hours with a freeze dryer machine. The process works like this: You put food into the freeze dryer chamber. The machine flash freezes the food, so the water inside it turns to ice. Harvest Right units go to -30°F or colder. A pump removes air from the chamber, creating a vacuum.
    www.primalsurvivor.net/home-freeze-drying-food/
    You can find everything you need to build a freeze dryer for home use on websites such as Amazon, or from a local hardware store. Some core components include a couple of vacuum chambers, a regular cooking pot, dry ice, Styrofoam, and denatured ethanol (aka methylated spirit). You will need minimal tools to assemble these parts together.
    www.makeuseof.com/diy-freeze-dryers-you-can-ma…
     
  2. The Best Freeze Dryers, Vetted - Picks by Bob Vila

     
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